148mm pump on a sub 800 cc motor/ported 701

[Roseand]

Soo I may be able to get a deal on a 148 mag so I'm considering trying it on a built 701(freestyle cylinder porting, b pipe, 200 psi, lightened flywheel) with a sub 80 LB freestyle hull.

With the correct prop, is it possible to get it to hit pretty good and be as efficient as a 144 mag on a smaller motor like that? It'd be nice to have a pump that I can still use when I go up to a bigger motor.
Thoughts?

 

[DAG]

A 144 is efficient? The 148 is a no brainer. Ppl run a 155 with sub 800cc motors

 

[Draggingto]

@SpaceCowboy ran a skat 155 pump with a JM781

 

[SpaceCowboy]

@SpaceCowboy ran a skat 155 pump with a JM781

Yes I did and it worked great. Many big bore and non PV stokers potential is lost by not using a bigger pump...best upgrade you can do.


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[Proformance1]

start around a 7/12 and open up venturi and steering, and never look back

 

[AWolf34]

My friend @moto x just bought a 148 to use with an 809 5 mil stroker were supposed to be getting. Hes running a 735 at the moment and notices quite a big difference. I'd say no brainer. Pick it up!

 

[moto x]

Ya I just put a 148 set back on my 735 with a power factor and I noticed quiet a bit of a difference. I would definitely pick one up if you can

 

[speedysprocket]

Anyone have experience with 148 6 vane, big hub pumps on their small engines...?

 

[Roseand]

@steve-uk

 

[SpaceCowboy]

Anyone have experience with 148 6 vane, big hub pumps on their small engines...?

What is your concern on a 6 vs a 14?


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[speedysprocket]

You mean vs 12 vanes...? I want to know who's tried it. I know such pumps have existed in the past, but everyone's been fixated on 12 vanes lately. You could check my thread under new releases if you're wondering why I'd ask... I already know they work for larger engines.

 

[SpaceCowboy]

You mean vs 12 vanes...? I want to know who's tried it. I know such pumps have existed in the past, but everyone's been fixated on 12 vanes lately. You could check my thread under new releases if you're wondering why I'd ask... I already know they work for larger engines.

I don't see why it wouldn't work with the correct impeller, reduction nozzle, and steering nozzle. You are getting more area as everyone knows vs a 144. I believe @air blair was using a OEM 155 in one of this skis and it produced really good results vs a 144 pump.

 

[speedysprocket]

OEM 155s use a small hub, though, correct? So you're not forcing that large volume of water into a smaller area, thus increasing velocity and load on the engine. Regardless, I have some smaller props I plan on testing with a superjet this spring/summer.

 

[SpaceCowboy]

OEM 155s use a small hub, though, correct? So you're not forcing that large volume of water into a smaller area, thus increasing velocity and load on the engine. Regardless, I have some smaller props I plan on testing with a superjet this spring/summer.

Correct. I have heard people using a pump stuffer which acts as a mag section in the OEM 155. I think you have a great idea and it should work on any motor with the correct pitch impeller and respective nozzles. Keep up the good work.

 

[chadman154]

some local guys have tried oem 155s, ended up going mag in the end.